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SC212 Test #2: Practical Genetics

Total questions: 26

Worksheet time: 20mins

Name
Class
Date
1.

A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?

a)

25%

b)

50%

c)

75%

d)

100%

e)

33.3%

2.

What does heterozygous mean?

a)

An organism that has the same genes for a trait (AA or aa)

b)

An organism that has different genes for a trait (Aa)

c)

When neither gene is fully dominant; offspring is a mixture of both

d)

the different forms of a trait (hair color--> brown, blonde, red

3.

The dominant trait is

a)

yellow pea seeds

b)

green pea seeds

c)

there is no dominant seed

d)

Jolly green giant

4.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
5.
___________________________ is the study of how traits are passed on, or inherited.
a)
dominant traits
b)
ratio
c)
phenotype
d)
genetics
6.
True or False:  Recessive traits are ALWAYS present 
a)
True
b)
False
7.

_____________________ is the appearance of an organism, or how it looks

a)

phenotype

b)

genotype

c)

karyotype

d)

personality type

e)

tintype

8.

What would the genotypes be?

a)

TT, TT, Tt, Tt

b)

TT, Tt, tT, tt

c)

Tt, Tt, tt, tt

d)

None of the above

9.

If a father is IAIA and a mother is IAIB, what is the probability child with IAIB blood?

a)

0%

b)

25%

c)

50%

d)

75%

e)

33%

10.

Which of the following is a hybrid?

a)

IBIB

b)

ii

c)

IAi

d)

IAIA

11.

Looking at this pedigree, how many female family members are carriers?

a)

1

b)

3

c)

10

d)

7

12.
How many PAIRS of chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
13.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
14.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
15.
Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?
a)
Red
b)
Red and White
c)
White
d)
Pink
16.
A picture of the chromosomes of an individual. Can be used to diagnosis chromosome number abnormalities. 
a)
Punnett square
b)
Electrophoresis
c)
Pedigree
d)
Karyotype
17.
A segment of DNA that codes for a particular protein.
a)
Chromosome
b)
Nucleotide
c)
Allele
d)
Gene
18.
Alternate forms of the same gene.
a)
Chromosomes
b)
Nucleotides
c)
Alleles
d)
Nucleosomes
19.
Genes that are found on chromosomes 1-22.
a)
Autosomal
b)
Sex-linked
20.
Genes that are found on the X or Y chromosome.
a)
Autosomal
b)
Sex-linked
21.

Chromosomes in a karyotype are arranged from

a)

largest to smallest

b)

smallest to largest

c)

thickest to thinnest

d)

most genes to fewest genes

22.
A pair of identical chromosomes shown in a karyotype, one inherited from mom, and one inherited from dad are called
a)
sister chromotids
b)
centromeres
c)
homologous chromosomes
d)
autosomes
23.

A sperm contains

a)

Both an X and a Y chromosome

b)

Two X chromosomes

c)

An X or a Y chromosome

d)

only a Y chromosome

24.

"Normal" human males have

a)

1 X chromosome and 1 Y chromosome

b)

2 X chromosomes

c)

2 Y chromosomes

25.

"Normal" human females have

a)

1 X chromosome and 1 Y chromosome

b)

2 X chromosomes

c)

2 Y chromosomes

26.
The gender of this karyotype is...
a)
Male
b)
Female

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